Rubbing cloth for use in manufacturing liquid crystal display panels

Abstract

The present invention provides a rubbing cloth for use in manufacturing liquid crystal display panels which consists of a velvet fabric having a ground sheet texture comprising warps and wefts, and pile yarns woven to the ground sheet texture in the warp direction, wherein synthetic fibers as the warps were woven with combination of different tensions of the synthetic fibers, or the ground sheet texture comprises warps with combination of different feed lengths, so that the pile yarns are stably inclined.

1. A rubbing cloth for use in manufacturing liquid crystal display panels which consists of a velvet fabric comprising:
 a ground sheet texture comprising warps and wefts, wherein the warps are woven to the wefts; and 
 pile yarns woven to the ground sheet texture in a weaving direction of the warps, 
 wherein the warps are composed of warps having different weaving tensions, 
 the wefts are arranged to overlap each other by the different weaving tension of the warps when viewed from the top, and 
 the pile yarns are held inclined at an inclination at the same angle in one direction along the warp throughout the rubbing cloth by the wefts. 
 
   
   
     2. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 1 , wherein the pile yarns are inclined in the warp direction relative to the normal line to the ground sheet surface, and the inclinations of the pile yarns are caused by a difference in tensile distribution of the warps on the ground sheet surface. 
   
   
     3. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 1 , wherein the pile yarns are inclined in the warp direction relative to the normal line to the ground sheet surface, and the inclination angle of the pile yarn to the normal line is 5 degrees or more and 45 degrees or less. 
   
   
     4. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 1 , wherein among the warps which constitute the ground sheet, a lower tension was applied to some warps at optional predetermined intervals than to other warps when the warps were woven. 
   
   
     5. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 4 , wherein the warps which constitute the ground sheet were fed through a twin beam, and a higher tension was applied to warps fed through one beam of the twin beam than to warps fed through another beam of the twin beam when the warps were woven, so that the warps with higher tension and the warps with lower tension are arranged at optional predetermined intervals. 
   
   
     6. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 1 , wherein some of the warps which constitute the ground sheet were highly shrinkable synthetic fibers, and the highly shrinkable synthetic fibers were shrunk after weaving. 
   
   
     7. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 6 , wherein the highly shrinkable synthetic fibers are polyester fibers having a boiling water shrinkage of 8% or more. 
   
   
     8. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 1 , wherein the pile yarns consist of synthetic fibers having an electric resistivity of 10 8  cm or more and 10 10  cm or less. 
   
   
     9. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 1 , wherein one or both of the warps and wefts which constitute the ground sheet comprise conductive synthetic fibers having an electric resistivity of 10 −2  cm or more and 10 6  cm or less. 
   
   
     10. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 9 , wherein a resin comprising a conductive substance was coated and cured on the back side of the ground sheet texture. 
   
   
     11. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 1 , wherein among the ground yarns which constitute the ground sheet, some ground yarns are colored yarns having a different color from other ground yarns, and the colored yams are present at optional predetermined intervals so that the ground sheet texture has different colors at optional predetermined intervals. 
   
   
     12. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 11 , wherein the colored yarns are black conductive synthetic fibers containing carbon powder. 
   
   
     13. A rubbing cloth for use in manufacturing liquid crystal display panels which consists of a velvet fabric comprising:
 a ground sheet texture comprising warps and wefts, wherein the warps are woven to the wefts; and 
 pile yarns woven to the ground sheet texture in a weaving direction of the warps, 
 wherein the warps are composed of warps having a same apparent length in the ground sheet but having different actual lengths which are lengths if the warps are straight, 
 the wefts are arranged to overlap each other by the different weaving tension of the warps when viewed from the top, and 
 the pile yarns are held inclined at an inclination at the same angle in one direction along the warp throughout the rubbing cloth by the wefts. 
 
   
   
     14. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 13 , wherein the pile yarns are inclined in the warp direction relative to the normal line to the ground sheet surface, and the inclinations of the pile yarns are caused by the different feed lengths of the warps of the ground sheet. 
   
   
     15. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 13 , wherein the pile yarns are inclined in the warp direction relative to the normal line to the ground sheet surface, and the inclination angle of the pile yarn to the normal line is 5 degrees or more and 45 degrees or less. 
   
   
     16. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 13 , wherein among the warps which constitute the ground sheet, some warps were fed in larger feed amount at optional predetermined intervals than to other warps when the warps were woven. 
   
   
     17. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 16 , wherein the warps which constitute the ground sheet were fed through a twin beam, and warps fed in larger feed amount and warps fed in smaller feed amount are arranged at optional predetermined intervals. 
   
   
     18. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 17 , wherein the warps fed in smaller feed amount were highly shrinkable synthetic fibers, and the highly shrinkable synthetic fibers were shrunk after weaving. 
   
   
     19. The rubbing cloth for use in manufacturing liquid crystal display panels according to  claim 18 , wherein the highly shrinkable synthetic fibers are polyester fibers having a boiling water shrinkage of 8% or more.